Genome-wide variation and transcriptional changes in diverse developmental processes underlie the rapid evolution of seasonal adaptation.

Autor:	Dowle EJ; Department of Integrative Biology, University of Colorado Denver, Denver, CO 80217; eddy.dowle@otago.ac.nz gregory.ragland@ucdenver.edu.; Department of Anatomy, University of Otago, 9016 Dunedin, New Zealand., Powell THQ; Department of Biological Sciences, Binghamton University-State University of New York, Binghamton, NY 13902.; Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611., Doellman MM; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556.; Department of Ecology and Evolution, The University of Chicago, Chicago, IL 60637., Meyers PJ; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556., Calvert MB; Department of Integrative Biology, University of Colorado Denver, Denver, CO 80217., Walden KKO; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801., Robertson HM; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801., Berlocher SH; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801., Feder JL; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556.; Environmental Change Initiative, University of Notre Dame, Notre Dame, IN 46556., Hahn DA; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801., Ragland GJ; Department of Integrative Biology, University of Colorado Denver, Denver, CO 80217; eddy.dowle@otago.ac.nz gregory.ragland@ucdenver.edu.; Department of Entomology, Kansas State University, Manhattan, KS 66506.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2020 Sep 22; Vol. 117 (38), pp. 23960-23969. Date of Electronic Publication: 2020 Sep 08.
DOI:	10.1073/pnas.2002357117
Abstrakt:	Many organisms enter a dormant state in their life cycle to deal with predictable changes in environments over the course of a year. The timing of dormancy is therefore a key seasonal adaptation, and it evolves rapidly with changing environments. We tested the hypothesis that differences in the timing of seasonal activity are driven by differences in the rate of development during diapause in Rhagoletis pomonella , a fly specialized to feed on fruits of seasonally limited host plants. Transcriptomes from the central nervous system across a time series during diapause show consistent and progressive changes in transcripts participating in diverse developmental processes, despite a lack of gross morphological change. Moreover, population genomic analyses suggested that many genes of small effect enriched in developmental functional categories underlie variation in dormancy timing and overlap with gene sets associated with development rate in Drosophila melanogaster Our transcriptional data also suggested that a recent evolutionary shift from a seasonally late to a seasonally early host plant drove more rapid development during diapause in the early fly population. Moreover, genetic variants that diverged during the evolutionary shift were also enriched in putative cis regulatory regions of genes differentially expressed during diapause development. Overall, our data suggest polygenic variation in the rate of developmental progression during diapause contributes to the evolution of seasonality in R. pomonella We further discuss patterns that suggest hourglass-like developmental divergence early and late in diapause development and an important role for hub genes in the evolution of transcriptional divergence. Competing Interests: The authors declare no competing interest. (Copyright © 2020 the Author(s). Published by PNAS.)
Databáze:	MEDLINE
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